| 摘要 |
PROBLEM TO BE SOLVED: To prevent a pile top from breaking down due to shearing force or bending moment at an earthquake, while effectively utilizing the shearing proof stress of a pile main body. SOLUTION: In this base isolation construction, an outer pipe 2 is projectingly provided from the base plate 3 as the base part of an upper structure into the ground so as to surround a pile main body 1. A base side slide member 4 is provided on the underside of the base plate 3, and the upper face of a pile top cap 8 covering a pile top 6 is slidably brought in contact with the underside of a slide plate 9 constituting the base side slide member 4.
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